Module: openfermion.linalg.erpa

Code to generate the eigenvalue problem for the ERPA equations

Functions

einsum(...): einsum(subscripts, *operands, out=None, dtype=None, order='K', casting='safe', optimize=False)

erpa_eom_hamiltonian(...): Evaluate \(\sum_{a,b,c,d}h_{a, b, d, c}<\psi[p^ q, [a^ b^ c d, r^ s]]\psi>\)

singlet_erpa(...): Generate the singlet ERPA equations